Narrative:

Aircraft X had a right-hand gear indication of both red and green out of ZZZ. I received a call from ZZZ1 line maintenance control that they were troubleshooting this problem and concluded that it was an indication problem; i.e.; no flight affects on controls to indicate to indicate a single gear not retracted (yaw); checked for popped cbs; and moved gear handle from off-up-off position. Then at approximately 2 hours into flight; I received a call from dispatch informing me that he was diverting due to fuel close; or into his reserve. I asked the dispatcher to ask the crew if he was going to write up the indication problem. He called me back with the captain on the phone instead. I asked the captain what his right-hand gear indication was; and he said still red and green. I asked the captain if he was going to write up the indication problem if the indication went to 3 green after gear down for landing. He said no. I asked the captain if there was still no change with gear down would he be willing to cycle the gear. He said yes. Then I said to the captain that the gear cycle is up to your discretion. He acknowledged. After landing; maintenance informed me that there was no write-up and aircraft showed 3 green. Aircraft continued without any further indication problems. I would have suggested for a logbook write-up rather than ask crew if there was a logbook write-up. Callback conversation with reporter revealed the following information: reporter stated he doesn't know if the pilot's low fuel concerns and diverting to another airport; was related to burning extra fuel while trying to figure out whether the gear light problem was an actual gear still down; not retracted; or just an indication problem. Without any yaw effect on the aircraft that a single gear down would create; and all hydraulics functioning ok; all agreed the situation seemed to be an indication issue. Reporter stated; if needed; the copilot could have pulled up the floor aisle rug in the cabin and looked through the view port to see if the gear was actually down. Their quick reference handbook (QRH) procedure does allow for recycling the gear. Reporter stated he should have requested the pilot make a write-up; even though the landing at the downline station showed all three gears with green lights. If the gear light issue reoccurred; there wouldn't be any record to show the previous condition.

Related reports:

Google
 

Original NASA ASRS Text

Title: A Maintenance Controller realizes later he should have asked the pilot of a B737-300 with a right main gear indication showing both red and green lights; to make a write-up; instead of just asking him to cycle the gear.

Narrative: Aircraft X had a right-hand gear indication of both red and green out of ZZZ. I received a call from ZZZ1 Line Maintenance Control that they were troubleshooting this problem and concluded that it was an indication problem; i.e.; no flight affects on controls to indicate to indicate a single gear not retracted (yaw); checked for popped CBs; and moved gear handle from off-up-off position. Then at approximately 2 hours into flight; I received a call from Dispatch informing me that he was diverting due to fuel close; or into his reserve. I asked the Dispatcher to ask the crew if he was going to write up the indication problem. He called me back with the Captain on the phone instead. I asked the Captain what his right-hand gear indication was; and he said still red and green. I asked the Captain if he was going to write up the indication problem if the indication went to 3 green after gear down for landing. He said no. I asked the Captain if there was still no change with gear down would he be willing to cycle the gear. He said yes. Then I said to the Captain that the gear cycle is up to your discretion. He acknowledged. After landing; Maintenance informed me that there was no write-up and aircraft showed 3 green. Aircraft continued without any further indication problems. I would have suggested for a logbook write-up rather than ask crew if there was a logbook write-up. Callback conversation with reporter revealed the following information: Reporter stated he doesn't know if the pilot's low fuel concerns and diverting to another airport; was related to burning extra fuel while trying to figure out whether the gear light problem was an actual gear still down; not retracted; or just an indication problem. Without any yaw effect on the aircraft that a single gear down would create; and all hydraulics functioning ok; all agreed the situation seemed to be an indication issue. Reporter stated; if needed; the copilot could have pulled up the floor aisle rug in the cabin and looked through the view port to see if the gear was actually down. Their Quick Reference Handbook (QRH) procedure does allow for recycling the gear. Reporter stated he should have requested the pilot make a write-up; even though the landing at the downline station showed all three gears with green lights. If the gear light issue reoccurred; there wouldn't be any record to show the previous condition.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.